Free Anti Spam Programs Do Any One Know A Free Anti-virus And Anti-spam For Laptop?

Do any one know a free anti-virus and anti-spam for laptop? - free anti spam programs

I wanted to know if someone knows whether it is a place where you can get a free download Anit-virus software for laptops (mine is a Toshiba)? I do not like throwing money into the disc into Best Buy or other stores, some discs, which lasted only 1 or 2 years. I do not think paying for a place as a free anti-virus and anti-spam, and then you have to pay to download!